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United States Patent | 5,181,584 |
Simard | January 26, 1993 |
The ladder leveling adapter comprises a pair of spacers adapted to be secured outwardly on the side rails of the ladder between two interconnecting rounds. An elongated bar having a median slot parallel to the rail extends over the spacers and projects below the rails. Each rail and each adjacent elongated bar are connected together by a pair of threaded rods having a nut threadedly mounted on the inner side of the rail and quick release tightening means on the outer side of the bar. A friction means is mounted around each rod between the spacer and the bar for preventing a longitudinal slipping between the bar and the rail. The quick release tightening means comprises a knob axially mounted on the rod having a flat surface abuting on the bar and a lever for slidingly moving the knob against the bar. The knob includes a pin which extends in the slot of the bar for preventing the rotation of the lever relative to the slot, the pin having a length greater than the releasing distance of the release means.
Inventors: | Simard; Yves M. (410, Route 381, Ferland, Quebec, CA) |
Appl. No.: | 851580 |
Filed: | March 16, 1992 |
Current U.S. Class: | 182/201; 182/107 |
Intern'l Class: | E06C 007/00 |
Field of Search: | 182/201,200,202,203,204,205,107 |
992408 | May., 1911 | Drake | 182/201. |
1323227 | Nov., 1919 | Kirby | 182/201. |
2147052 | Feb., 1939 | Noone | 182/205. |
2245306 | Jun., 1941 | Smith | 182/203. |